Using H-Convergence to Calculate the Numerical Errors for 1D Unsaturated Seepage Under Steady-State Conditions

dc.contributor.affiliationDepartment of Civil, Geological and Mining Engineering, Polytechnique Montréal, Montreal, QC, Canada
dc.contributor.affiliationSNC-Lavalin, Montreal, QC, Canada
dc.contributor.affiliationDepartment of Construction Engineering, École de Technologie Supérieure, Montreal, QC, Canada
dc.contributor.affiliationGeotechnical Engineering Team Lead, BBA, Montreal, QC, Canada
dc.contributor.affiliationCollege of Construction Engineering, Jilin University, Changchun, China
dc.contributor.affiliationEnvironmental Engineering program, University of Medellin, Medellin, Colombia
dc.contributor.affiliationDepartment of Mechanical Engineering, Polytechnique Montréal, Montreal, QC, Canada
dc.contributor.authorChapuis R.P.
dc.contributor.authorTaveau C.
dc.contributor.authorDuhaime F.
dc.contributor.authorWeber S.
dc.contributor.authorMarefat V.
dc.contributor.authorZhang L., Blessent D.
dc.contributor.authorBouaanani N., Pelletier D.
dc.date.accessioned2025-12-03T19:34:52Z
dc.date.available2025-12-03T19:34:52Z
dc.date.issued2025
dc.descriptionUnsaturated zones are important for geotechnical design, geochemical reactions, and microbial reactions. The numerical analysis of unsaturated seepage is complex because it involves highly nonlinear partial differential equations. The permeability can vary by orders of magnitude over short vertical distances. This article defines and uses H-convergence tests to quantify numerical errors made by uniform meshes with element size (ES) for 1D steady-state conditions. The quantitative H-convergence should not be confused with a qualitative mesh sensitivity study. The difference between numerical and mathematical convergences is stated. A detailed affordable method for an H-convergence test is presented. The true but unknown solution is defined as the asymptote of the numerical solutions for all solution components when ES decreases to zero. The numerical errors versus ES are then assessed with respect to the true solution, and using a log–log plot, which indicates whether a code is correct or incorrect. If a code is correct, its results follow the rules of mathematical convergence in a mathematical convergence domain (MCD) which is smaller than the numerical convergence domain (NCD). If a code is incorrect, it has an NCD but no MCD. Incorrect algorithms of incorrect codes need to be modified and repaired. Existing codes are shown to converge numerically within large NCDs but generate large errors, up to 500%, in the NCDs, a dangerous situation for designers. © 2024 John Wiley & Sons Ltd.
dc.identifier.doi10.1002/nag.3876
dc.identifier.instnameinstname:Universidad de Medellínspa
dc.identifier.issn3639061
dc.identifier.reponamereponame:Repositorio Institucional Universidad de Medellínspa
dc.identifier.repourlrepourl:https://repository.udem.edu.co/
dc.identifier.urihttp://hdl.handle.net/11407/9267
dc.language.isoeng
dc.publisherJohn Wiley and Sons Ltdspa
dc.publisher.facultyFacultad de Ingenieríasspa
dc.publisher.programIngeniería Ambientalspa
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85207119111&doi=10.1002%2fnag.3876&partnerID=40&md5=d152fc39695cc5974ab71587ff70b2a4
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dc.rights.accesoAll Open Access
dc.rights.accesoBronze
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.sourceInternational Journal for Numerical and Analytical Methods in Geomechanics
dc.sourceInt. J. Numer. Anal. Methods Geomech.
dc.sourceScopus
dc.subjectGroundwater
dc.subjectMathematical convergence
dc.subjectNumerical analysis
dc.subjectNumerical convergence
dc.subjectNumerical errors
dc.subjectUnsaturated
dc.subjectConvergence of numerical methods
dc.subjectGroundwater geochemistry
dc.subjectNonlinear equations
dc.subjectSeepage
dc.subjectSensitivity analysis
dc.subjectConvergence domains
dc.subjectConvergence test
dc.subjectElement sizes
dc.subjectH convergences
dc.subjectMathematical convergence
dc.subjectNumerical convergence
dc.subjectNumerical errors
dc.subjectSteady-state condition
dc.subjectUnsaturated
dc.subjectUnsaturated seepage
dc.subjectMesh generation
dc.titleUsing H-Convergence to Calculate the Numerical Errors for 1D Unsaturated Seepage Under Steady-State Conditions
dc.typeArticle
dc.type.localArtículospa
dc.type.versioninfo:eu-repo/semantics/publishedVersion

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